Buttonhole bottom thread consumption calculation method and bobbin remaining thread control method

Abstract

The present invention relates to a calculation method of buttonhole bottom thread consumption and a bobbin remaining thread amount control method. The keyhole bottom thread consumption calculation method first determines the reference bottom thread amount M and the unit bottom thread increase B of different keyhole shapes by means of measurement. , according to the shape of the buttonhole to be sewn, and according to the size of the buttonhole and the requirements of the buttonhole sewing form, the required buttonhole bottom thread consumption can be quickly and accurately calculated, which is convenient and convenient to calculate and has a wide range of applications. The bobbin remaining thread amount control method, using the buttonhole bottom thread consumption calculated by the buttonhole bottom thread consumption calculation method, monitors and judges the bobbin remaining thread amount during the sewing process, and the bobbin remaining thread amount is the warning bottom thread amount , start warning and countdown, stop the buttonhole machine in time, reasonably and efficiently control the remaining thread amount of the bobbin during the sewing work of the buttonhole machine, avoid the phenomenon of empty needles, and at the same time control the final margin of the bobbin upper thread to the greatest extent to the shortest.

Description

technical field [0001] The invention relates to the field of buttonhole machines, in particular to a method for calculating buttonhole bottom thread consumption and a method for controlling the amount of bobbin remaining thread. Background technique [0002] When the buttonhole machine is working, due to the installation position of the rotary hook and the structure of related parts, it is difficult to observe the remaining thread amount of the bottom thread on the bobbin. When the bobbin thread is exhausted, if the operator fails to replace the bobbin that has run out of the bobbin thread in time, there will be an empty needle phenomenon, resulting in frequent rework of sewn products and waste of high-grade fabrics. Therefore, it is necessary to leave an appropriate value for the remaining thread amount of the bobbin at the end of sewing, and this value should meet the design requirements, while the remaining thread amount of the bobbin for the buttonhole machine will be de...

AI Technical Summary

Problems solved by technology

[0002] When the buttonhole machine is working, due to the installation position of the rotary hook and the structure of related parts, it is difficult to observe the remaining thread amount of the bottom thread on the bobbin

When the bobbin thread is exhausted, if the operator does not replace the bobbin that has run out of bobbin thread in time, there will be empty needles, resulting in frequent rework of sewing products and waste of high-grade fabrics

Therefore, it is necessary to leave an appropriate value for the remaining thread amount of the bobbin at the end of sewing, and this value should meet the design requirements, while the amount of remaining thread for the bobbin of the buttonhole machine will be determined according to the consumption of the bottom thread of the buttonhole (required for sewing a buttonhole) The bobbin thread length) is different, and it is difficult to control the remaining thread amount of the bobbin in actual work.

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